Apparatus for melting tar and heating gravel.



PATENTED MAY 2, 1905.

F. MARSH.

APPARATUS FOR MELTING TAR AND HEATING GRAVEL.

7 APPLICATION FILED DEC. 9, 1904.

NITED STATES Patented May 2, 1905.

PATENT OFFICE.

FRANK MARSH, OF NEWARK, NEW JERSEY, ASSIGNOR OF THIRTY-SEVEN ANDONE-HALF PER CENT. TO JOHN HJDALE, OF NEWARK, NEW JERSEY, ANDTWENTY-FIVE PER CENT. TO EDWARD C. DAVIDSON,

OF ELIZABETH, NEW JERSEY.

APPARATUS FOR MELTING TAR AND HEATING GRAVEL.

SPECIFICATION forming part of Letters Patent No. 788,662, dated May 2,1905.

Application filed December 9, 1904. Serial No. 236,087.

To all whom it new concern:

Be it known that I, FRANK MARSH, a citizen of the United States,residing at Newark, New Jersey, have invented certain new and usefulImprovements in Apparatus for Melting Tar and Heating Gravel, of whichthe following is a specification.

This invention relates to the apparatus ordinarily employed in thelaying of pavement or other structures or work requiring the admixtureof a material such as tar with heated gravel, sand, or stone. Itcomprises an organization hereinafter set forth in detail by which thetar is melted and the gravel heated at the same time by the same fireand in the same apparatus.

In the accompanying drawings, Figure 1 is a perspective view, partlybroken away at one side; Fig. 2, a plan view, and Fig. 3 a detailedsectional view on the line 3 3 of Fig. 2.

The apparatus comprises an ordinary melting-furnace consisting of ashell A, in the top of which is seated an open melting-pot B, and in thebottom is a door 0 for the insertion of fuel, which is usually wood.

f is a pipe near the top of the shell for carrying off products ofcombustion.

Provision as follows is made for heating the gravel: Around the exteriorof the shell A is a trough 0, consisting of but a vertical side 71: anda horizontal side or bottom J, braced at their junction by an,angle-iron Z. This structure is suspended from the upper edge of theshell by hangers D, having hooked ends 2', that engage the rim of themelting-pot, extend downwardly against the sides of the shell, and thenoutwardly under the bottom J of the trough; This construction affords anopen trough of which the inner wall is formed by the shell of theheater. For convenience the trough C may be formed in sections, foursuch (marked 1, 2, 3, and 4:) being shown. In this case hangers D areapplied at or near both ends of each section. This makes a convenientarrangement for transporting and handling the heater and trough.

9 indicates the gravel. The trough C also acts as a platform upon whichthe workmen may stand to have convenient access to the melting-pot B.

So far as I am aware, an apparatus of this general character by whichthe simultaneous operation of the melting of tar or other similarmaterial and the heating of the gravel or other similar material may besimultaneously conducted is new. Practical experience has shown it to beefficient and economical.

Heretofore separate heaters have been required for the gravel, and withthis apparatus the same results are obtained with a single fire in theuse of no more fuel than is necessary for the melting operation.

I claim as my invention 1. A tar-melting heater comprising a metal shelland open melting-pot, combined with an external gravel-receptacle,independent of the pot and located below it, for the purpose set forth.

2. A tar-melting heater comprising a metal shell, a melting-pot and anannular trough independent of the pot and surrounding the shell for thereception of gravel, for the purpose set forth.

3. A tar-melting heater comprising a metal shell and melting-pot,combined with an external, removable gravel-trough, for the purpose setforth.

4. A tar-melting heater comprising ametal shell and melting-pot,combined with an external, annular, sectional, removable graveltrough,for the purpose set forth.

5. A tar-melting heater comprising a metal shell and melting-pot,combined with a detachable external trough, the inner wall of which isformed by the shell of the heater.

6. A tar-melting heater comprising a metallic shell and melting-pot,asectionalextersections are suspended from the upper edge nalgravel-trough and hangers by Which the of the heater. IO trough isremovably suspended from the up- In testimony whereof I have hereuntosubper edge of the heater. scribed my name.

5 7. A tar-melting heater comprising a me- FRANK MARSH.

tallic shell and melting-pot, combined with an Witnesses: externalgravel-trough, formed of removable L. F. BROWNING,

sections and hangers, by which the several KATHARINE MAoMAHoN.

